From: Anup Patel <anup.patel@wdc.com>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Rob Herring <robh+dt@kernel.org>
Cc: Atish Patra <atish.patra@wdc.com>,
Alistair Francis <Alistair.Francis@wdc.com>,
Anup Patel <anup@brainfault.org>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, Anup Patel <anup.patel@wdc.com>,
Bin Meng <bmeng.cn@gmail.com>
Subject: [RFC PATCH v4 05/10] dt-bindings: interrupt-controller: Add ACLINT MSWI and SSWI bindings
Date: Thu, 7 Oct 2021 18:06:27 +0530 [thread overview]
Message-ID: <20211007123632.697666-6-anup.patel@wdc.com> (raw)
In-Reply-To: <20211007123632.697666-1-anup.patel@wdc.com>
We add DT bindings documentation for the ACLINT MSWI and SSWI
devices found on RISC-V SOCs.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---
.../riscv,aclint-swi.yaml | 97 +++++++++++++++++++
1 file changed, 97 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,aclint-swi.yaml
diff --git a/Documentation/devicetree/bindings/interrupt-controller/riscv,aclint-swi.yaml b/Documentation/devicetree/bindings/interrupt-controller/riscv,aclint-swi.yaml
new file mode 100644
index 000000000000..f034c18f46bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/riscv,aclint-swi.yaml
@@ -0,0 +1,97 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/riscv,aclint-swi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V ACLINT Software Interrupt Devices
+
+maintainers:
+ - Anup Patel <anup.patel@wdc.com>
+
+description:
+ RISC-V SOCs include an implementation of the M-level software interrupt
+ (MSWI) device and the S-level software interrupt (SSWI) device defined
+ in the RISC-V Advanced Core Local Interruptor (ACLINT) specification.
+
+ The ACLINT MSWI and SSWI devices are documented in the RISC-V ACLINT
+ specification located at
+ https://github.com/riscv/riscv-aclint/blob/main/riscv-aclint.adoc.
+
+ The ACLINT MSWI and SSWI devices directly connect to the M-level and
+ S-level software interrupt lines of various HARTs (or CPUs) respectively
+ so the RISC-V per-HART (or per-CPU) local interrupt controller is the
+ parent interrupt controller for the ACLINT MSWI and SSWI devices.
+
+allOf:
+ - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+ compatible:
+ oneOf:
+ - items:
+ - enum:
+ - sifive,fu540-c000-aclint-mswi
+ - const: riscv,aclint-mswi
+
+ - items:
+ - enum:
+ - vendor,chip-aclint-sswi
+ - const: riscv,aclint-sswi
+
+ description:
+ For ACLINT MSWI devices, it should be "<vendor>,<chip>-aclint-mswi"
+ and "riscv,aclint-mswi".
+ For ACLINT SSWI devices, it should be "<vendor>,<chip>-aclint-sswi"
+ and "riscv,aclint-sswi".
+
+ reg:
+ maxItems: 1
+
+ "#interrupt-cells":
+ const: 0
+
+ interrupts-extended:
+ minItems: 1
+ maxItems: 4095
+
+ interrupt-controller: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts-extended
+ - interrupt-controller
+ - "#interrupt-cells"
+
+examples:
+ - |
+ // Example 1 (RISC-V MSWI device used by Linux RISC-V NoMMU kernel):
+
+ interrupt-controller@2000000 {
+ compatible = "sifive,fu540-c000-aclint-mswi", "riscv,aclint-mswi";
+ interrupts-extended = <&cpu1intc 3>,
+ <&cpu2intc 3>,
+ <&cpu3intc 3>,
+ <&cpu4intc 3>;
+ reg = <0x2000000 0x4000>;
+ interrupt-controller;
+ #interrupt-cells = <0>;
+ };
+
+ - |
+ // Example 2 (RISC-V SSWI device used by Linux RISC-V MMU kernel):
+
+ interrupt-controller@2f00000 {
+ compatible = "vendor,chip-aclint-sswi", "riscv,aclint-sswi";
+ interrupts-extended = <&cpu1intc 1>,
+ <&cpu2intc 1>,
+ <&cpu3intc 1>,
+ <&cpu4intc 1>;
+ reg = <0x2f00000 0x4000>;
+ interrupt-controller;
+ #interrupt-cells = <0>;
+ };
+...
--
2.25.1
next prev parent reply other threads:[~2021-10-07 12:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-07 12:36 [RFC PATCH v4 00/10] Linux RISC-V ACLINT Support Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 01/10] RISC-V: Clear SIP bit only when using SBI IPI operations Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 02/10] RISC-V: Treat IPIs as normal Linux IRQs Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 03/10] RISC-V: Allow marking IPIs as suitable for remote FENCEs Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 04/10] RISC-V: Use IPIs for remote TLB flush when possible Anup Patel
2021-10-07 12:36 ` Anup Patel [this message]
2021-10-08 2:46 ` [RFC PATCH v4 05/10] dt-bindings: interrupt-controller: Add ACLINT MSWI and SSWI bindings Rob Herring
2021-10-08 5:46 ` Anup Patel
2023-06-16 14:39 ` Vivian Wang
2021-10-07 12:36 ` [RFC PATCH v4 06/10] irqchip: Add ACLINT software interrupt driver Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 07/10] RISC-V: Select ACLINT SWI driver for virt machine Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 08/10] dt-bindings: timer: Add ACLINT MTIMER bindings Anup Patel
2021-10-08 2:46 ` Rob Herring
2021-10-08 5:48 ` Anup Patel
2021-10-08 20:02 ` Rob Herring
2021-10-07 12:36 ` [RFC PATCH v4 09/10] clocksource: clint: Add support for ACLINT MTIMER device Anup Patel
2021-10-07 12:36 ` [RFC PATCH v4 10/10] MAINTAINERS: Add entry for RISC-V ACLINT drivers Anup Patel
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